Electric-light switch.



G. P. SMITH.

ELECTRIC LIGHT SWITCH.

APPLICATION rum) MAY 19, 1911 1,018,934. Ptgifid Feb.-27, 1912.

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CLAUDE I. SMITH, 01? OAK PARK, ILLINOIS.

ELECTRIC-LIGHT SWITCH.

Application filed May 19, 1911.

To all whom it may concern:

Be it known that I, CLAUDE P. SMITH, a citizen of the United States,residing at Oak Park, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Electric-Light Switches, ofwhich the following is a specification.

The invention relates to an extension switch for electric light snapbuttons, having reference particularly to a form of switch including anoperating pull cord disposed within easy access to obviate the usualnecessity of reaching to the globe snap button, said globe beinggenerally placed in a comparatively high position for purposes of lightdistribution and safety.

The object of the invention is the provision of a simple, effectiveextension switch which can be quickly sprung on and disengaged from theordinary type of incandescent light snap but-ton by any inexperiencedperson.

The novel features of the invention are embraced in a weighted arm,normally out of operating connection with the snap button and operableby a pull cord, and in a locking roller to cause operating connection ofsaid button and arm in a downward pull on the cord.

The invention comprises the novel con struction and arrangement of partsnow to be described, reference being had to the accompanying drawings,in which like reference numerals refer to like parts.

In the drawings, Figure 1 is a side elevation showing the improvedswitch operatively connected to the snap button of an electriclight'globe. Fig. 2 is a rear elevation, partly broken away, showing thelocking roller and cooperating parts; and Fig. 3 is a view of severaldetails. Fig. 4 is a transverse section on line 83 of Fig. 1.

Referring to the drawings, 1 denotes the means whereby the extensionswitch is attached to the snap button 2 of an electric light globe,being preferably in the form shown comprising a metal spring clip,approximately U-shape in cross section and 0 such dimensions as toinclose and firmly grip said button when sprung on the latter. Fixedlyconnected to clip 1 and extending rearwardly therefrom, is an operatingshaft 3, on which, spaced from clip 1 by a Washer 4, is loosely mounteda switch lever 5, a' washer 6 spacing the latter from the headed end 7of the shaft 3, that port-ion of the Specification of Letters Patent.

Patented Feb. 2'7, 1912.

Serial No. 628,186.

latter engaging washer 4 and clip 1 being of rectangular formation andthe remaining portion cylindrical. Switch lever 5 is provided at itslower terminal with a. weight 8 tending to maintain said lever inupright position and to return it to said position when displacedtherefrom through a pull on cord 9 attached to the upper terminal of thelever, said terminal being slightly curved to insure the pull cordhanging spaced from the body of the lever and freely operable. Formed inan expanded port-ion 10 of lever 5 contiguous the bearing therein ofshaft 3, is a cam slot 11, narrowing toward its lower endand disposed inangu lar relation to the vertical when the lever is in upright position,said slot housing a locking roller 12 adapted for limited movementtherein, washers 1 and 6, abutting the opposite faces of said portionrespectively, and preventing accidental displacement of said roller andmaintaining the parts in operative relation. The slot 11 and roller 12are of such dimensions that the latter will contact with and lightlybear against the shaft 3 and that side of the slot opposite said shaft,permitting, when cord 9 is pulled, partial revolution of the lever onthe shaft, said lever, through the action of roller 12 as slot 11 movesin said partial revolution, being forced into binding contact with saidshaft which, during a continued pull on cord 9 will turn clip 1 andinclosed button 2 and snap the light on. Upon release of cord 9 weight 8will return the lever to normal upright position, roller 12 beingreleased in the initial movement of said return operation from bindingcontact with slot 11 and shaft 3 the latter with attached clip 1 andbutton 2 incidentally remaining stationary. At the termination of thereturn movement of lever 5 the device is in position, upon another pullof cord 9, to further turn button 2 and snap the light off, said lightbeing thus of course alternately turned on and off respectively, bysuccessive pulls on cord 9.

Having thus described the invention, what is claimed as new, is:

1. An extension switch for electric snap buttons comprising a resilientbutton-engaging clip, a shaft fixed to the clip, a. lever mounted forlimited revolution on said shaft and means carried by the lever to bindthe lever to the shaft in the movement of the former in one direction.

movement of the lever in one direction to bind the latter to the shaftand to release the shaft and lever from binding engagement in themovement of the lever in the opposite direction.

3. An extension switch for electric snap buttons comprising a resilientbutton-engaging clip, a shaft fixed to the clip, a lever carried by theshaft, and connected to a cord and a weight adapted respectively to movesaid lever in opposite directions, and means carried by the lever andadapted to bind the shaft-to the lever in the cord-influenced movementof the lever and to release the shaft and lever from bindingengagementin the weightinfluenced movement of the latter.

4. An extension switch for electric snap buttons comprising a resilientbutton-engaging clip, a shaft fixed to the clip, a lever mounted forlimited revolution on said shaft and provided with a cam slot, a cordconnected to the lever and adapted to move the same in one direction, aweight carried by the lever and adapted to move the latter in anopposite direction, and a locking roller carried by the slot and adaptedto bind the lever to the shaft in the cord-influenced movement of thelever and to release the shaft and lever from binding engagement in theweight-influenced movement of the lever.

5. An extension switch for electric snap buttons comprising a resilientbutton-engaging clip, a shaft integral with said clip, a

lever mounted for limited revolution on said shaft, a ball clutchintermediate said lever and. shaft, a cord connected to one end of saidlever and adapted to move the same in one direction, a weight carried bythe opposite end of said lever and adapted to move the latter in anopposite direction upon the release of the cord, said ball clutchadapted to operatively connect the lever to the shaft in the movement ofthe former under the influence of the cord and to disconnect said leverand shaft upon the release of the cord under the influence of theweight.

6. An extension switch for electric snap buttons comprising aresilient'button-engaging clip, a shaft formed integral With the clip, alever having an expanded medial portion, said expanded portion adaptedto i receive said shaft and provided with a cam slot, washers-mountedupon said shaft and engaging the opposite sides of the expanded medialportion of the lever, a locking roller carried by the slot and heldtherein against lateral displacement by said washers, a cord secured toone end of the lever and adapted to move the same in one direction, aweight carried by the opposite end of the lever and adapted to move thelatter in an opposite direction, said locking roller adapted to bind thelever to the shaft in the movement of the latter under the influence ofthe cord and to release the shaft and lever from binding engagement uponthe release of the cord and under the influence of the weight.

In testimony whereof I affix my signature in presence of two witnesses.

CLAUDE P. SMITH. Witnesses R. W. ANDER, R. W. KEMPER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. 0.

